Hoist control means



May 12, 1942. L. w. wAcHTl-:R

HOIST CONTROL MEANS 2 Sheets-Sheet 1 .Filed Jan. 22, 1941 May 12, 1942 Lfw. wAcHTER HOIST CONTROL MEANS 2 Sheets-y-Sheet 2 Filed Jan.' 22, 1941 Patented May 12, 1942 HOIS' CONTROL lVIEANS Lester W. Wachter, Streator, Ill., assignor to Anthony Company, Streator, Ill., a corporation of Illinois Application January 22, 1941, serial No. 375,474

17 claims. (o1. 298-22) This invention relates to means for tipping a support or receptacle, and has for one object to provide means for controlling the tip and for preventing over-tipping. Another object is to provide means in connection with a tipping mechanism for cushioning the movement of the mechanism in the tipping direction and for assisting in the return from the tipping direction.

Other objects will appear from time to time throughout the specification and the claims.

' This invention is illustrated more or less diagrammatically in the accompanyingr drawings, wherein:

Figure 1 is a side elevation of the invention a applied to a tipping receptacle; e

Figure 2 is a horizontalvsection taken at line 2-2 of Figure 1 on an enlarged scale;

Figure 3 is a longitudinal vertical section taken at line 3-3 of Figure 2 on a further enlarged scale;

Figure 4 is a sectional ydetail taken at line 4 4 of Figure 2 on an enlarged scale; Y

Figure 5 is a sectional detail taken at line 5 5 of Figure 4.

Like parts are indicated by like characters throughout the specification and the drawings.

In the particular form here shown, the tipping mechanism and the receptacle to be tipped are carried on av frame or base Which includes members I, I. The furtherdetails of the frame are not shown as they form no essential part of the invention. Any suitable part might be used.. Mounted on the base I is a subframe 2 which includes longitudinal members and suitable transverse members, if necessary. The longitudinal members may be formed of single channels or multiple parts in any shape desired. At one end, hinge members 3 'are secured `to the frame members 2, and theyarepivoted as at 4 -on the base I. The pivot may include ashaft 5 or other` suitable means. Mountedon thesubframe 2 is a receptaclehaving a bottom 6 and side walls 1. At the rear, a tail gate 8 may be pivoted as at 9 or as at I5, or any form of gate construction may be used.

. The tipping or dumping mechanism comprises means for dumping the platform or frame 2 with respect to the support I. Obviously, Idumping means may be used whether there is av receptacle or a mere platform or other support for material to be carried and subsequently dumped.

'Ihe dumping mechanism here shown includes a hydraulic cylinder II pivoted tothe support I as at I2. A piston, not shown, is mounted within the cylinder, and a piston rod I3 extends foutwardly from the cylinder. The piston and piston rod are moved by'pressure uid which is supplied from any suitable source and is supplied and controlled by means not here shownf since their details form no part of the present invention. The piston rod I3 is fastened to ka cross head I4 which is mounted upon a shaft I5. Pivoted at their upper` ends on the shaft I5 are links I5, I6, Whichat their lower ends are pivoted on a .rod I1 which is mounted in members i8 on the frame or base I. A second pairof links i9, I9 is mounted on a rod 20 which is supported in members 2|, 2l on the base I. The links I9 are pivoted at their free ends by means of pins 22 to links 23. These links are preferablyY of channel section, as shown in Figure 2 in particu,- lar. At their upper ends they are pivoted as at 24 to theframe 2 or the body 6.` Pivoted also on the pins'22, and preferably Within and embraced by the links 23, are additional links 25, 25.V These links'are preferably of channel section,.and at their upper ends are pivoted to the cross shaft I5 upon which the cross head I4 is mounted- Mounted Within the links 25 are rubber or other relatively resilient and relatively yielding blocklike members 26. These members are shown in detail in Figures 4 and 5, and may be held in place by cotter pins 21, or otherwise.` As shown, the members 26 are preferably lprovided with `alternating grooves 28 and lands 29.y `The lands may be in contact with the interior surface of the links 25. The blocks 26 are preferably so positioned in their respective links 25 that along one face they are in` contactwith the bot.'-kk tom of the channels of which these members are made. Along their outerface, they are inclined somewhat as at 30. 'I'he direction of the inclination of the faces 30 is preferably away fromv the end of the link 25 which is pivoted upon or :se-

cured to the shaft I5.

Although there is shown anoperative form "of the device, it will be understoodv that many changes in the form, shape andarrangement of v parts might be made without departing from the spirit of this invention, and it is wished that the showing be taken as, in a sense, diagram,- matic. 1 I In particular, where reference has been made to rubber as a cushioning. or restraining-means or tip-preventing means, it is to be understood that this expression meansrubber or a material which has substantially its equivalent physical properties. y

The use andoperation of this invention vare as follows: 1. w In the form illustrated herewith, the invention vis embodied in` tipping means for the body of an automobile truck. Some lmeans for supplying fluid under. pressure-such, for exampldas a hydraulic pump-is provided, and it may be conveniently operated by the engine ofthe -ve hicle or otherwise. Figure 1 isv the upright' or untipped position. When it is-desired to tip the body, uid under pressure is applied tothe cylin derfand the piston isforced from the full vline 25. Further tip is thus yieldingly resisted until the body reaches its full tip which, with the proportions here shown, is approximately 55- degrees. Obviously, these relationships of inclination can be varied, and those mentioned specifically are merely an example of one suitable installation.

Bodies of this general type have a tendency to overrun as they approach a steep angle of tip. Obviously, the center of gravity is. moved to the rear in tipping, and the combinedweight of the body and loadv sometimes runs away from the tipping. mechanism, and the body has a tendency totip violently or snap to the rear. This isun.- satisfactory for` many .reasons and particularly because ittends to batter and damage various parts of the total assembly.

Onepurpose of the cushion mechanism is to resist this.overrunning and to cushion it.. Since the cushion. 26 is contactedby the link I9 well before the completion of the tip, further movement of the parts in the tipping directionis accomplished only by compression or yieldingof the cushion. 26. As above set out, this member is of rubber or generally equivalent material, and itis relieved alongits sides by grooves 28 which are preferably at right angles to the bottom of the channelwhich forms the .link 25. As. the movement of the tip continuesfromthe point of rst contact. of the link I9 with the edge 30 of the cushion 2G, some `fiow of the cushion member occurs and gradually it ows into the grooves 42l! which. may be wholly or partially iilled. Ordinarily, when the bodyhas moved to the f-ull tipped. position, these grooves have been completely iilled. As the mechanism .moves position and the cushion is distorted as above described,` compression is built Iup in the cushion and,when the body isreversed for return to the untipped, position, the. cushion member tends. to expand andto assist the return of the body. The cushionmember. thus provides a means for preventing run away, means for, cushioning the movementin the tipping. direction. andmeans for assisting or initiating movement in the return direction. As movement in the return direction occurs,l rst, the cushion is permitted to expand and. the grooves 284 again, reappear and, finally, the. link` I'S moves out of contact with the surface 3,0 and with the cushion 26. In the descriptionabove, the cushion 26 and the link L9 have been described in. the singular. Obviously, inthe present form, there are two. There might 4be only a single link andthere. might be more than two.

I claim: 1. In combination in a linkage, two hinged members and two movable links, said links being mounted for movement with relation to said hinged members, means for. moving saidflinks towardV each other, and means for yieldingly resisting and for cushioning their movement, said means including a cushion member positioned on one of said links, said cushion being provided with a face adapted to be contacted by the other of` said links, said cushion being shaped to provide portions of reduced width.

2. In combination in a linkage, two hinged members and two movable links, said links being mounted for movement with relation to said hinged members, means for moving said links toward each other, and' means for yieldingly resisting `and for cushioning their movement, said means including a cushion member positioned on one of said links, said link shaped to surround toV the run upped said cushion in part, said cushion being provided with aface adapted to be contacted by the other of said links, said' cushion being shaped to provide portions of reduced width.

3. In combination in a linkage, two movable links, means for moving them toward each other, and. means for yieldingly resisting and for cushioning their movement, said means including a cushion member positioned on one of said links, said link shaped to surround said cushion inpart, said' cushion being provided with a face adapted to be contacted by the ,other ofV said links, said cushion being` shapedto provide portions of reduced width, said portions being out of contact with. the surrounding link parts, and extending into that part of said cushion which is surrounded in part bysaid link.

4.. In combination in a linkage, two movable links, means-for moving them toward each other, and means for yieldingly resisting and for cushioning their movement, said means including a cushion member positioned on one of said links, said cushion being provided with a lface adapted to bev contacted by thev other of said links, said cushion being shaped to provide' portions of reduced width, said portions ofreduced width comprisinggroove likeparts and extending in a direction substantially opposite to the direction of movement of said links when they approach each other.

5. In combination in a linkage, two movable links, means for moving them towardeach other, and means for yieldingly resisting and for'cushioning their movement, said means including a cushion member positioned on one of said links, said link shaped to surround said cushion inpart, saidcushion being provided with a face adapted to be contacted'by the other of said links, said cushion being shaped' to provide` portions of reduced width, said portions beingy out of contact withthe surrounding link parts, said portions of reduced width comprising groove like parts.Y and extending in a direction substantially opposite to the direction of movement of said. linksA when theyapproach eachother.

6. In combination inavehicle tipping'mechanism, a support, a load-carrying member mounted-V thereon for tipping movement with respect thereto, and power means for causingA said` tipping movement, saidzmeans; including links, one of. said links being of. channel' section, another'of saidy links adapted, during the tipping movement, to move into said channeland deformable means positioned in said channel to4 be contacted by said entering member during the progress of the tip and adapted to be. compressed between said two members during al latter portion ofv saidtippingmovement. f 1 f '7. In combination' in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement withA respect thereto, andi power means' for causing said tipping movement,A saidr means including a plurality of links, two of said' links, during, the tipping movement, .beingv causedl to movel toward;y each other,l and cushioning means formed` of resilient'material interposed VIbetween said links, said cushioning means being of such size that during thevv latter part of the tip it is in contact with both of said links and is deformed thereby.

8. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and cushioning means formed of resilient material interposed between said links, said cushioning means being of such size that during the latter part of the tip it is in contact with both of said links and is deformed thereby, said cushioning member being shaped to provide portions of reduced width.

9. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement. being caused to move toward each other. and cushioning means formed of resilient material interposed between said links, said cushioning means being of such size that during the latter part ofthe tip it is in contact with both of said links and is deformed thereby, said cushioning member being shaped to provideportions of reduced width, the longitudinal axes of said portions being generally opposite to the direction of movement of said links as they move toward each other.

10. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and cushioning means formed of resilient material interposed between said links and carried by one of them, said cushioning means being of such size that during the latter part of the tip it is in contact with both of said links and is deformed thereby.

11. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and

cushioning means formed of resilient material interposed between said links and carried by one of them and partially enclosed by said link, said cushioning means being of such size that during the latter part of the tip it is in contact with both of said links and is deformed thereby.

12. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and cushioning means formed of resilient material interposed between said links and carried by one of them, and partially enclosed by said link, said cushioning means being of such size that during the latter part of the tip it is in contact with both of said links and is deformed thereby, said cushioning member being shaped to provide portions of reduced width, the longitudinal axes of said portions being generally opposite to the direction of movement of said links as they move toward each other.

13. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping with respect thereto, and power means for causing said tipping movement, and means associated with said power tipping means for preventing overrunning in the tipping direction, said last mentioned means including a restraining member comprising a mass of readily deformable resilient compressible material, said power tipping means including relatively rigid parts positioned about said resilient material and limiting the extent and direction of its deformation during the tipping movement.

'14. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for positively causing said tipping movement, and means comprising a restrainer against involuntary tipping movement of the body, when partially tipped, said restraining means being formed of a mass of readily deformable and compressible material, and means partially enclosing said mass of readily deformable and compressible material, said enclosing means forming a part of said tipping means.

15.' In combination in a vehicle tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including links, one of said links being of channel section, another of said links adapted, during the tipping movement, to move into said channel, and rubber means positioned in said channel to be contacted by said entering member during the progress of the tip and adapted to be pressed between said two members during a latter portion of said tipping movement.

16. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto,

and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and cushioning means formed of rubber material interposed between said links, said cushioning means being of such size that during the latter y part of the tip it is in contact with both of said links and is deformed thereby.

1'7. In combination in a tipping mechanism, a support, a load-carrying member mounted thereon for tipping movement with respect thereto, and power means for causing said tipping movement, said means including a plurality of links, two of said links, during the tipping movement, being caused to move toward each other, and

-cushioning means formed of compressible matey rial interposed between said links and carried by one of them, said cushioning means being of such size that during a substantial part of the latter part of the tip it is in contact with both of said links and is deformed thereby.

LESTER W. WACHTER. 

